package com.jin.gulimall.seckill.scheduled;

import com.jin.gulimall.seckill.service.SeckillService;
import lombok.extern.slf4j.Slf4j;
import org.redisson.api.RLock;
import org.redisson.api.RedissonClient;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Service;

import java.util.concurrent.TimeUnit;

/**
 * 秒杀商品定时上架
 */
@Slf4j
@Service
public class SeckillSkuSchedule {

    @Autowired
    SeckillService seckillService;

    @Autowired
    RedissonClient redissonClient;

    private final String upload_lock = "seckill:sku:lock";
    /**
     * 定时上架接下来三天要秒杀的商品
     */
    @Scheduled(cron = "*/3 * * * * ?")
    public void uploadSeckillSku3Days(){
        //重复上架处理：采用分布式锁，同时业务代码要保证幂等性
        log.info("上架秒杀的商品信息......");
        //分布式锁。锁的业务执行完成，状态已经更新完成。释放锁以后，其他人获取到就会拿到最新的状态
        RLock lock = redissonClient.getLock(upload_lock);
        lock.lock(10, TimeUnit.SECONDS);
        try {
            seckillService.uploadSeckillSku3Days();
        }finally {
            lock.unlock();
        }
    }
}
